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  • Computational Mechanics of the Paddlefish Rostrum

    Abstract: The rostrum of a paddlefish provides hydrodynamic stability during feeding process in addition to detect the food using receptors that are randomly distributed in the rostrum. The exterior tissue of the rostrum covers the cartilage that surrounds the bones forming interlocking star shaped bones. Design/methodology/approach – The aim of this work is to assess the mechanical behavior of four finite element models varying the type of formulation as follows: linear-reduced integration, linear-full integration, quadratic-reduced integration and quadratic-full integration. Also presented is the load transfer mechanisms of the bone structure of the rostrum. Findings – Conclusions are based on comparison among the four models. There is no significant difference between integration orders for similar type of elements. Quadratic-reduced integration formulation resulted in lower structural stiffness compared with linear formulation as seen by higher displacements and stresses than using linearly formulated elements. It is concluded that second-order elements with reduced integration and can model accurately stress concentrations and distributions without over stiffening their general response. Originality/value – The use of advanced computational mechanics techniques to analyze the complex geometry and components of the paddlefish rostrum provides a viable avenue to gain fundamental understanding of the proper finite element formulation needed to successfully obtain the system behavior and hot spot locations.

  • A look back at the career of Louis O.D. Kealer

    Louis O.D. Kealer’s career with the U.S. Army Corps of Engineers was impressive. He had contact with literally thousands of persons in the Yell, Logan, and Perry county areas, as well as over the state of Arkansas, during his 50 year career – 42 years at Blue Mountain and Nimrod Lakes. Even if you didn’t know Mr. Kealer personally you may be interested in this as a partial history of the two lakes.

  • ERDC honored with Federal Laboratory Consortium Southeast Regional Excellence in Technology Transfer Award

    A U.S. Army Engineer Research and Development Center’s Environmental Laboratory (ERDC-EL) team led by Research Engineer Dr. Victor Medina has been recognized by the Federal Laboratory Consortium (FLC) Southeast Region for accomplishing outstanding work in the process of transferring federally developed technology.

  • MKARNS Nav Notice SWL 21-36 Lock 6 Scheduled to Reopen

    MKARNS - David D. Terry Lock (No. 6) will temporarily reopen to navigation traffic at 6 p.m. on Tuesday, Sep. 7th for a period of 12 hours until 6 a.m. on Wednesday, Sep. 8th.

  • Hurricane Ida Recovery Support

    Andrew Auxier, deployed to Louisiana for Hurricane Ida recovery as a Local Government Liaison, is at the site of first blue roof install in Orleans Parish.

  • 21-052 Little Goose Dam temporarily closed to public crossing due to maintenance work

    STARBUCK, Wash. – Officials at Little Goose Lock and Dam will temporarily close public crossing today and tomorrow, Sept. 8 and 9, to support repair work.

  • Corps hosting virtual workshop for Taylorsville Lake Master Plan Update

    The U.S. Army Corps of Engineers is in the process of updating its 1978 Master Plan for Taylorsville

  • District attorney selected for national award

    ST. PAUL, Minn. – The U.S. Army Corps of Engineers headquarters, in Washington D.C., recently selected St. Paul District deputy district counsel and St. Paul, Minnesota resident, Vinai Vinlander as the recipient of the Joseph W. Kimbel award. The award recognizes the U.S. Army Corps of Engineers attorney who demonstrates the highest professional potential for future legal achievement.

  • New K-ETA requirements for travel to the Republic of Korea

    Effective Sept. 1, 2021, all DoD Civilians, Contractors and Family Members, traveling to the Republic of Korea must have a valid visa or an approved Korea - Electronic Travel Authorization (K-ETA) prior to entering the country, unless already in possession of a valid Korean visa.

  • Iterative Learning Algorithm for Records Analysis (ILARA) User Manual

    Abstract: This manual is intended for new users with minimal or no experience with using the Iterative Learning Algorithm for Records Analysis (ILARA) tool. The goal of this document is to give an overview of the main functions of ILARA. The primary focus of this document is to demonstrate functionality. Every effort has been made to ensure this document is an accurate representation of the functionality of the ILARA tool. For additional information about this manual, contact ERDC.JAIC@erdc.dren.mil